Ball pen having light emitting device

Abstract

A ball pen including a light emitting device is provided. In the ball pen, a light emitting diode (LED) is enclosed in a figurine attached to the end of the ball pen and two electric wires are connected to the LED. One of the wires is connected to one electrode of a battery and the other is in contact with a cone-shaped spring positioned at the lower portion of the battery. The cone of the cone-shaped spring is pushed up by an ink cartridge, making the cone-shaped spring come into contact with one electrode of the battery, so that an electric current flows through a circuit including the battery and the LED, thereby illuminating the LED. A stick is firmly engaged with the push button member and thus, the push button member is pushed to make inclined surfaces of a cylinder-rotation sawtooth and an inclined protruding stopper, which are formed in a rotational cylinder, glide along the inclined surfaces of the cylinder-rotation side protrusions, thereby rotating the rotational cylinder. Whenever the rotational cylinder is rotated, the point of the ball pen sticks out or goes back into the tip hole of the ball pen. According to the ball pen including a light emitting device, the light emitting device can be lit not only when the point of the ball pen is pressed on paper, but also when the push button member is pushed to use or not to use the ball pen. Therefore, the ball pen including the light emitting device can attract the interest of a user.

What is claimed is:  
     
       1. A ball pen including an ink cartridge, the ball pen comprising: 
       a light emitting device in which first and second electric wires are connected to a light emitting diode (LED) ( 12 );  
       a battery ( 14 ) installed at the bottom of the light emitting device, one electrode of the battery being in contact with the first electric wire ( 16   b ) connected to the LED;  
       a cone-shaped spring ( 15 ) installed near the other electrode of the battery ( 14 ), the tip of the cone-shaped spring contacting the ink cartridge ( 30 ) and the base of the cone-shaped spring contacting the second electric wire ( 16   a ) connected with the LED,  
       a push button member ( 10 ) containing the LED ( 12 ), the battery ( 14 ) and the cone-shaped spring ( 15 ), the push button member having a positioning hole ( 17 ) formed at its bottom;  
       a stick ( 21 ) having longitudinal hole through which the ink cartridge ( 30 ) can pass, and having a plurality of cylinder-rotation side protrusions ( 23 ) formed in the middle of the stick, the upper end of the stick being inserted into the positioning hole of the push button member;  
       a rotational cylinder ( 24 ) encircling the lower portion of the stick ( 21 ) and having an inclined protruding stopper ( 25 ) protruding from its inner wall at the upper end of the rotational cylinder nearest the push button member ( 10 ) and a cylinder-rotation sawtooth ( 26 ) protruding from its inner wall at the lower end of the rotational cylinder;  
       a trunk portion ( 20 ) having a cylinder shape and open ends and being divided into an upper portion and a lower portion by a partition formed in the middle of the trunk portion, the partition having a through hole ( 27   b ) at its center, the push button member ( 10 ) being inserted into the upper portion, the rotational cylinder ( 24 ) being inserted into the lower portion, the stick ( 21 ) extending through the through hole ( 27   b ) so that the push button member ( 10 ) and the rotational cylinder ( 24 ) may be assembled by means of the stick, the trunk portion ( 20 ) having a helical compressive spring which is installed between the push button member ( 10 ) and the partition, and encircles the stick ( 21 ); and  
       a barrel ( 40 ) having the ink cartridge ( 30 ) therein, the upper end of the barrel being inserted into the lower portion of the trunk portion ( 20 ) so that the barrel may be combined with the trunk portion to rotatably fix the rotational cylinder ( 24 ) between the upper end of the barrel and the partition of the trunk portion,  
       wherein pressing the push button member ( 10 ) or pushing a point of the ball pen attached to the end of the ink cartridge ( 30 ) causes the ink cartridge ( 30 ) to compress the cone-shaped spring ( 15 ), causing the tip of the cone-shaped spring ( 15 ) to contact the other electrode of the battery, thereby illuminating the LED.  
     
     
       2. The ball pen as claimed in  claim 1 , wherein the cylinder-rotation side protrusions ( 23 ) each has an upper inclined surface and a lower inclined surface, the upper inclined surface having substantially the same angle as an inclined surface of the inclined protruding stopper ( 25 ) of the rotational cylinder ( 24 ), the lower inclined surface having substantially the same angle as an inclined surface of the cylinder-rotation sawtooth ( 26 ) of the rotational cylinder ( 24 ).